🩺 Appendicitis Inflammatory Response (AIR) Score
UseWhen to use: children or adults with suspected appendicitis when labs are available.
StrataStrong for advanced appendicitis ruling-in/out at extremes; middle needs imaging.
LimitsWhen not to use: peritonitis already requiring immediate OR without s… · Pitfall: incomplete labs then forcing a high/low label. · Compare with Alvarado / pediatric pathways locally.
SourceAndersson M, Andersson RE. World J Surg 2008 (AIR)
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
0–12 points.
When to use
When to use: children or adults with suspected appendicitis when labs are available.
How it works
Vomiting (1) + RIF pain (1) + rebound 0–3 + fever≥38.5 (1) + WBC 0–2 + PMN% 0–2 + CRP 0–2. Total 0–12.
Key points
- 0–12 points.
- Designed vs Alvarado with inflammatory labs.
- Next: ultrasound/CT per pathway.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Vomiting | No (0) |
|---|---|
| Pain in right iliac fossa | No (0) |
| Rebound tenderness / muscular defense | Light (1) |
| Body temperature ≥ 38.5 °C | No (0) |
| WBC ×10⁹/L | 10.0–14.9 (1) |
| Polymorphonuclear leukocytes | 70–84% (1) |
| CRP mg/L | 10–49 (1) |
→AIR4/12
- Band：Low probability — observation / alternative Dx often appropriate
| Vomiting | No (0) |
|---|---|
| Pain in right iliac fossa | No (0) |
| Rebound tenderness / muscular defense | None (0) |
| Body temperature ≥ 38.5 °C | No (0) |
| WBC ×10⁹/L | < 10 (0) |
| Polymorphonuclear leukocytes | < 70% (0) |
| CRP mg/L | < 10 (0) |
→AIR0/12
- Band：Low probability — observation / alternative Dx often appropriate
Verification & sources · governance
FAQ
Frequently asked questions
- Does Appendicitis Inflammatory Response (AIR) Score upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is Appendicitis Inflammatory Response (AIR) Score calculated in practice? Can you show a worked example?
- Inputs: Vomiting No (0), Pain in right iliac fossa No (0), Rebound tenderness / muscular defense Light (1), Body temperature ≥ 38.5 °C No (0), WBC ×10⁹/L 10.0–14.9 (1), Polymorphonuclear leukocytes 70–84% (1), CRP mg/L 10–49 (1) → Result: AIR 4 /12（Band: Low probability — observation / alternative Dx often appropriate） Inputs: Vomiting No (0), Pain in right iliac fossa No (0), Rebound tenderness / muscular defense None (0), Body temperature ≥ 38.5 °C No (0), WBC ×10⁹/L < 10 (0), Polymorphonuclear leukocytes < 70% (0), CRP mg/L < 10 (0) → Result: AIR 0 /12（Band: Low probability — observation / alternative Dx often appropriate）